<template>
    <div class="login_container">
      <div class="login_box">
        <!--  头像区域    -->
        <div class="avatar_box">
          <img src="../assets/logo.png" alt="">
        </div>
        <!--   登陆表单区域  -->
        <el-form ref="loginFormRef" :model="loginForm" :rules="rules" label-width="0px" class="login_form">
        <!--  用户名    -->
          <el-form-item prop="username">
            <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
          </el-form-item>
        <!--  密码    -->
          <el-form-item prop="password">
            <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
          </el-form-item>
        <!-- 按钮 -->
          <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登陆绑定数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则
      rules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置操作
    resetLoginForm () {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      // 预校验
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: result } = await this.$http.post('login', this.loginForm)
        if (result.meta.status === 200) {
          this.$message({
            message: '恭喜你,登陆成功！',
            type: 'success'
          })
          // 1.将登陆成功之后的token，保存在客户端的 sessionStorage 中
          window.sessionStorage.setItem('token', result.data.token)
          // 2.通过编程式导航跳转到后台主页，路由地址是 /home
          this.$router.push('/home')
        } else {
          this.$message.error('账号或密码错误!')
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  background-color: #fff;
  width: 450px;
  height: 300px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  border-radius: 5px;

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: white;
    img {
      height: 130px;
      width: 130px;
      border-radius: 50%;
      background-color: #eee;

    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}

</style>
